1 feel that one of my main duties ______ a teacher is to help the students to become better learners.
| A．for | B．by | C．as | D．with |
a single world can change the meaning of a sentence, a single sentence can change the meaning of a paragraph.
| A． | Just as | B． | Even though |
| C． | Until | D． | Unless |
Albert Einstein was born in 1879. As a child, few people guessed that he a famous scientist whose theories would change the world.
| A．has been | B．had been |
| C．was going to be | D．was |
Body language can a lot about your mood, so standing with your arms folded can send out a signal that you are being defensive.
| A．take away | B．throw away |
| C．put away | D．give away |
If you swim in a river or lake, be sure to investigate is below the water surface. Often there are rocks or branched hidden in the water.
| A．what | B．who | C．that | D．whoever |
Studies have shown that the right and left ear sound differently.
| A．produce | B．pronounce |
| C．process | D．download |